The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
41% of the moon is not visible from earth at any time.
103